[Gmsh] Forcing all jacobians to be positive

[Carole-Anne Daunais]

Thank you Christophe for this quick answer!
What do you mean by setting the size directly? Is there another way I  
can set all shapes to be hexs instead of tets? I looked it up in the  
Archives but couldn't find.

Thank you

Christophe Geuzaine <cgeuzaine at uliege.be> a écrit :

>> On 29 May 2020, at 20:48, Carole-Anne Daunais  
>> <carole-anne.daunais at polymtl.ca> wrote:
>>
>> Hi,
>> I am using GMSH 4.5.6 to generate a 3d mesh. I used the following 2  
>> lines in the .geo file to ensure that no element would have a jac.<0.
>>
>> Mesh.ElementOrder = 2;
>> Mesh.HighOrderOptimize = 1;
>>
>> It unfortunately didn't work for me. The mesh is generated, but the  
>> software failed (froze). Is there another way I can force all  
>> jacobians to be positive when creating my mesh?
>>
>
> It works fine here. However you should remove  
> "Mesh.SubdivisionAlgorithm = 2;" (and set the sizes you want  
> directly), as this makes it harder for the optimizer.
>
> You can also use "Mesh.HighOrderOptimize = 2;", which will apply a  
> global elastic smoothing step before the brute-force optimization.
>
> Christophe
>
>
>
>
>> Thank you,
>>
>> Carole-Anne
>>
>>
>>
>>
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> —
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> http://www.montefiore.ulg.ac.be/~geuzaine